The RIDGID Chain Wrenches has a sturdy, cast-iron housing with an I-beam handle and a double jaw that gives fast, ratchet-like action in either direction. It is ideal for use in close quarters. The heavy-duty models have replaceable alloy steel jaws.RIDGID C-36 Heavy-Duty Chain Wrench Size: 900mm (36in).Rated Pipe Capacity: 110mm (4.1/2in).Actual O.D. Capacity: 185mm (7.1/2in).Chain Length: 725mm (29in).Weight: 7.1kg. Rated Pipe Capacity is the nominal diameter that can be correctly tightened.Actual O.D. Capacity is the actual O.D. that chain can accommodate.Additional Information:Length (mm): 900mmCapacity (mm): 185